# frozen_string_literal: true

# This importer is used when `github_importer_single_endpoint_notes_import`
# feature flag is on and replaces `NotesImporter` MR notes import.
#
# It fetches 1 PR's comments at a time using `issue_comments` endpoint, which is
# slower than `NotesImporter` but it makes sure all notes are imported,
# as it can sometimes not be the case for `NotesImporter`, because
# `issues_comments` endpoint it uses can be limited by GitHub API
# to not return all available pages.
module Gitlab
  module GithubImport
    module Importer
      class SingleEndpointMergeRequestNotesImporter
        include ParallelScheduling
        include SingleEndpointNotesImporting

        def importer_class
          NoteImporter
        end

        def representation_class
          Representation::Note
        end

        def sidekiq_worker_class
          ImportNoteWorker
        end

        def object_type
          :note
        end

        def collection_method
          :issue_comments
        end

        private

        def noteables
          project.merge_requests.where.not(iid: already_imported_noteables) # rubocop: disable CodeReuse/ActiveRecord
        end

        def page_counter_id(merge_request)
          "merge_request/#{merge_request.id}/#{collection_method}"
        end

        def notes_imported_cache_key
          "github-importer/merge_request/notes/already-imported/#{project.id}"
        end
      end
    end
  end
end